== Weekly PEM meeting ==
 * 2025/04/04(Fri) 17:00-
 * Regular meeting
 * Zoom2 : https://zoom.us/j/6676627462

==== General announcement ====

 * New fiscal year start
  * If you have idea for new schience and new project, please contact to Yokozawa

 * O4c [[https://observing.docs.ligo.org/plan/|url]]
  * Now commissioning break, Re-start 4th June end 7th Oct.
   * Discussion about the engineering run
  * KAGRA will join this with 10 Mpc sensitivity

 * Bi-weeklky VK PEM meeting 
  * To discuss the analysis during their measurements
  * Monday 17:00-(JST)
  * First meeting would be 7th Apr.

==== Meeting and Conference issue ====

  * TOBA and Gravity Gradient Workshop
   * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16567|JGW-G2516567]]
   * Various discussion

  * 4/11 : FS地震学　B02班研究集会 ＠ 地震研
   * Washimi will have a presentation 
  * 4/23,24 : From QUarks to Neutron Stars    * [[https://indico2.riken.jp/event/5141/page/405-overview|url]]
   * Yokozawa will have a presentation 
  * 5/9~10 : JGWC研究会 @ JAXA相模原
   * [[https://jgwc.s.nao.ac.jp/2025%e5%b9%b4%e7%a0%94%e7%a9%b6%e4%bc%9a/|url]]
   * 発表申込締切：2025年4月7日（月）
   * 参加登録締切：2025年4月21日（月）

  * 5/19~23 : GWADW2025 @ フロリダ     [[https://gwadw.clas.ufl.edu/|url]]
  * 5/25~28 : KIW12 @ 上海    [[https://kiw12.casconf.cn/page/1878817789607809024|url]]
  * 5/26~30: ET symposium @ ボローニャ    [[https://indico.ego-gw.it/event/819/|url]]
   * 締切：3/31

  * Other meetings [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/DAWG/conferences|url]]

If you have some presentations about PEM related, please contact to me.

==== Business travel ====

 * To Kamioka
  * Kaku+ (??)
  * Kyoto U. DPRI & Korea NIMS (5/23)
 * From Kamioka
  * Washimi (Tokyo 4/11)
  * Yokozawa (Tokyo 4/22-24)
  * Yokozawa (JAXA 5/9-10??)
  * Yokozawa (Kashiwa 5/14-16??)
  * Washimi (Sardegna, Middle of June - Middle of July?)
  * Washimi (Yamaguchi -> Hiroshima -> Kohch -> Okayama, 9/8-9/30?)

==== Jurnal paper issue ====
[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/Reports/JurnalPaperIssue|Details are here!]]

 * Non-linear ICA paper 
  * Now we discussed about the playground 

 * Schumann Resonance paper
  * Long term observation, seasonal variance
  * Amplified inside the mine
  * Others

 * O4 PEM paper
  * Start to investigate the topics

 * Microseism with machine learning

 * 1 Hz seismic motion paper
  * Start the investigation

==== General issue ====

 * Commissioning

  * PRFPMI
   * Latest sensitivity [[https://dac.icrr.u-tokyo.ac.jp/KAGRA/DAWG/Detchar/klog/klog33099|url]]
   * IFI treatment
    * Found the loosed screw in STM2
    * Clear improvement 128 Hz, 220 Hz
   * Added the de-whitening filter to Type-A GAS filter
    * Disappeared the peaks around 20 Hz
   * Reducing the RMS of the DARM error 
    * For the weaker coil driver
    * Installed the switching circuit
   * Damping the peaks around 40 Hz
   * PEM injection test
    * Washimi-san will report it
  * Cooler status
   * One cryocooler for duct shield was several trouble
   * We carefully checked it
  * Noise budget

 * 出張PEM injection ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=14016|planning form]])



==== Preparation for O4b ====

 * Coil preparation for magnetic injection
  * Done

 * Voltmeter preparation
  * AC power monitor installation
  * DC power monitor installation

==== Progress report ====

 * Ohashi
  * Microseismic noise with machine learning

 * Kaku
  * Magnetic field

 * Murofushi
  * Earthquake and GIF noise

 * Ozaki 
  * Nearby earthquake

 * Obara
  * Earthquake and suspension

 * Kume, Ueno
  * Noise subtraction

 * Nishizawa
  * Water newtonian noise
  * Magnetic field analysis

 * Washimi 
  * PEM injection

 * Yokozawa 
  * Noise hunting

==== Place for memo ====
 * [[https://www.gw-openscience.org/O3/o3aspeclines/|Line noise list in O3a public data]]
 * [[https://pubplan.ligo.org/CW/KAGRA_VectorDM.html|Summary page for KAGRA O3 vector dark matter]]